Not sure as I am still in the jungle
and haven't made it back to buy another module myself.

Are you sure you put it back into the socket correctly?
(I have already sealed my old unit up or I would look,
but if I remember correctly the two rows of contacts under the module
are the same and I can't remember if there was anything to prevent
the module being inserted 'backwards'.
If it is seated correctly then the only hope I can point to is
to remove it again and check the contacts.
It is entirely possible if you got it into water there may be
residue near the pins.

The 'shutter open' message sounds like there is communication occurring but it does not sound hopeful.
Keep in mind the module is driven by the motherboard and there
may be other damage you cannot see around/under the socket.

Be sure that when you power the device on that the back cover is on
so that it does not try to power up the camera while it is booting -
that could possibly cause some initialization errors.

Wish I could help more,
but until I get back to civilization all I can offer is best guesses.

Good luck